How do you fix the “No input signal” Error message? If the problem message “No Input Signal” is appearing on your computer monitor, try the troubleshooting methods in the sections below.
The Causes of the “No input signal” Message include:
What commonly happen in this scenario is that:
- The Computer is not sending out a signal
- Improper connection of the monitor
- The wrong input was chosen
- Poor hardware
- The computer won’t post
- Monitor initially functions before losing the signal.
The Computer is not sending out a signal
So, Ensure that the PC is powered on. The “no input signal” notice appears if the computer is shut off because it is unable to transmit a signal.
Improper Connection Of The Monitor
On the backs of the computer and the monitor, make sure the monitor cable is plugged in correctly and firmly.
The VGA, DVI, HDMI, or DisplayPort connector on the monitor cable is used to attach it to the rear of your computer.
By removing the cable from the back of the display and re-connecting it, you can make sure the monitor cable is not slack. To ensure sure the cable is not slack, it is also a good idea to rock it back and forth.
The monitor wire should then be unplugged from the computer’s back and reconnected. Make sure the cable connection is secure while connecting it to the computer.
NOTE:
Some systems may have a video card and an onboard video. When using this kind of PC, you will have two distinct connections for your display on the rear of your computer.
If you see more than one VGA, DVI, HDMI, or DisplayPort port and the display isn’t working, try the other ports.
The wrong input was chosen
Newer displays can be connected to computers using VGA, DVI, HDMI, or DisplayPort connectors. Use the appropriate input selection for these kinds of monitors.
Use the buttons on the monitor’s front or bottom edge to access the settings. Look for options to choose the cable your monitor uses and the type of connector (such as VGA, DVI, HDMI, or DisplayPort).
Poor hardware
If the connections seem to be in order, the video card or the monitor is probably malfunctioning.
The motherboard of the computer might be broken, which would prevent a signal from reaching the video card and monitor.
Connect a different monitor to your computer or your display to a separate computer to determine which component is malfunctioning. We also advise checking the motherboard for any problems.
- Your computer’s monitor is broken if a different one works on it.
- If your monitor functions on another computer, there may be a problem with your video card.
The computer won’t post
Check to see if your machine starts up after the POST procedure. In some cases, if the POST procedure is unsuccessful and the computer cannot boot properly, the message “No input signal” may show.
The motherboard may be at fault if the POST procedure fails and the computer won’t boot up. A computer motherboard failing the POST test is frequently caused by a fault in the motherboard or a defective capacitor.
Monitor initially functions before losing the signal.
If the monitor or computer operates for a time before failing and showing the “No input signal” message, it may be overheating.
If it overheats, the display will turn off to prevent further harm. To prevent further deterioration of the computer hardware, the computer may stop providing a signal to the monitor and shut down if it overheats.
In most cases, fixing an overheating monitor is not worthwhile. It will probably cost more to fix than to purchase a new monitor. Therefore, we advise swapping out a sweltering monitor.
If the computer is overheating, the fans that keep the processor, video card, or power supply cool may have stopped working.
Check the fans to make sure they are spinning. If they are not spinning at all when the computer is turned on, they need to be replaced.
If the fans are operating, utilize a software diagnostic tool, such as HWMonitor, to check their RPM.
The fans could not be rotating quickly enough, signaling that they need to be cleaned or replaced because they are damaged or clogged with dust.
If the computer processor is causing the overheating, replace the heat sink and fan assembly. If the CPU has been damaged, it might also need to be replaced.
They typically build the fans on a video card or power supply into the hardware and difficult to repair, if at all. To solve the overheating issue, you might have to swap either the power supply or the video card.
Final thoughtÂ
If your computer has onboard video and you think your video card is broken, you need to get a new motherboard. Alternatives to replacing the motherboard include installing a new video card. See: How to Install a Video Card on a Computer.
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